COASTER commuter rail
E188296
COASTER commuter rail is a regional passenger train service in San Diego County, California, connecting coastal communities between Oceanside and downtown San Diego.
All labels observed (5)
| Label | Occurrences |
|---|---|
| COASTER commuter rail canonical | 5 |
| Coaster commuter rail | 4 |
| COASTER commuter rail line | 1 |
| Coaster (commuter rail) | 1 |
| Coaster commuter rail line | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1669407 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: COASTER commuter rail Context triple: [Oceanside, railServedBy, COASTER commuter rail]
-
A.
Sounder commuter rail
Sounder commuter rail is a regional passenger train service in the Seattle area that connects downtown Seattle with surrounding communities in Pierce and Snohomish counties.
-
B.
Metrolink commuter rail
Metrolink commuter rail is a Southern California regional passenger rail system that connects the Inland Empire with Los Angeles and other surrounding counties.
-
C.
Amtrak Keystone Service
Amtrak Keystone Service is a passenger rail service operated by Amtrak that runs primarily between New York City and Harrisburg, Pennsylvania, providing frequent regional connections along the Keystone Corridor.
-
D.
O-Train
The O-Train is Ottawa’s urban rail transit system, providing light rail service across key corridors of Canada’s capital city.
-
E.
WES Commuter Rail
WES Commuter Rail is a suburban commuter rail service in the Portland, Oregon metropolitan area connecting Beaverton and Wilsonville.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: COASTER commuter rail Target entity description: COASTER commuter rail is a regional passenger train service in San Diego County, California, connecting coastal communities between Oceanside and downtown San Diego.
-
A.
Sounder commuter rail
Sounder commuter rail is a regional passenger train service in the Seattle area that connects downtown Seattle with surrounding communities in Pierce and Snohomish counties.
-
B.
Metrolink commuter rail
Metrolink commuter rail is a Southern California regional passenger rail system that connects the Inland Empire with Los Angeles and other surrounding counties.
-
C.
Amtrak Keystone Service
Amtrak Keystone Service is a passenger rail service operated by Amtrak that runs primarily between New York City and Harrisburg, Pennsylvania, providing frequent regional connections along the Keystone Corridor.
-
D.
O-Train
The O-Train is Ottawa’s urban rail transit system, providing light rail service across key corridors of Canada’s capital city.
-
E.
WES Commuter Rail
WES Commuter Rail is a suburban commuter rail service in the Portland, Oregon metropolitan area connecting Beaverton and Wilsonville.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail service
ⓘ
passenger rail service ⓘ public transportation system ⓘ |
| category |
Commuter rail in California
ⓘ
Rail transport in San Diego County ⓘ |
| connects |
Carlsbad
ⓘ
Del Mar area ⓘ Encinitas ⓘ Oceanside ⓘ San Diego ⓘ Solana Beach ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | San Diego County ⓘ |
| electrification | not electrified ⓘ |
| endPoint |
Santa Fe Depot (San Diego)
ⓘ
surface form:
San Diego Santa Fe Depot
|
| fareSystem | regional transit fare system in San Diego County ⓘ |
| geographicFeatureFollowed | Pacific Ocean coastline ⓘ |
| modeOfTransport | rail ⓘ |
| operatesIn |
California, United States
ⓘ
surface form:
California
San Diego County ⓘ United States of America ⓘ
surface form:
United States
|
| operator | North County Transit District ⓘ |
| owner | North County Transit District ⓘ |
| primaryFunction |
commuter transportation
ⓘ
regional passenger mobility ⓘ |
| propulsion | diesel ⓘ |
| regionServed |
San Diego metropolitan area
ⓘ
surface form:
Greater San Diego area
North County, San Diego ⓘ
surface form:
North County San Diego
|
| rollingStockType | diesel locomotive-hauled coaches ⓘ |
| routeType | coastal rail line ⓘ |
| serviceArea | coastal communities of San Diego County ⓘ |
| serviceClass | standard class ⓘ |
| serviceFrequency | peak-oriented commuter service ⓘ |
| servicePattern |
limited weekend service
ⓘ
weekday-focused service ⓘ |
| sharesTracksWith |
Amtrak California
ⓘ
surface form:
Amtrak Pacific Surfliner
BNSF Railway freight trains ⓘ |
| startPoint | Oceanside Transit Center ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| terminus |
Oceanside Transit Center
ⓘ
San Bernardino–Santa Fe Depot ⓘ
surface form:
Santa Fe Depot
|
| terminusCity |
Oceanside
ⓘ
San Diego ⓘ |
| ticketing | proof-of-payment system ⓘ |
| trackGauge | standard gauge ⓘ |
| usesRailCorridor |
San Diego Subdivision
ⓘ
surface form:
Los Angeles–San Diego–San Luis Obispo Rail Corridor
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: COASTER commuter rail Description of subject: COASTER commuter rail is a regional passenger train service in San Diego County, California, connecting coastal communities between Oceanside and downtown San Diego.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Coaster commuter rail
subject surface form:
Encinitas, California
this entity surface form:
Coaster commuter rail
subject surface form:
Oceanside, California
this entity surface form:
Coaster commuter rail
this entity surface form:
Coaster commuter rail line
this entity surface form:
Coaster commuter rail
this entity surface form:
Coaster (commuter rail)
this entity surface form:
COASTER commuter rail line